If you are a student of a partner school or a member of a partner organization you are entitled to 10% discount! Request a discount here. If not, ask your teacher or your organization to become a partner: https://www.tsubook.net/en/partnership/
If you speak English and another language, you can translate part of Tsubook and have licenses in exchange. More info here.
If you are a group of five people or more who want to buy a license, you can profit from a discount! For example for 5 to 9 purchases we give you a 10% discount if purchased at once! Write us to ask to get more details on group purchases!